bardzo szybko prosze o pomoc ??? rozwiąż podane równania :
a) 1/2x^2-5/2x+3=0
b) -1/3x^2+2x+7/3=0
c)x^2-8x=4
d) 2x^2+x=3
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a) 24
b)45
c)52
d)13